Unlock the reliability key of power equipment

Unlock the reliability key of power equipment

The German Industrial Standards (DIN/VDE) are renowned worldwide for their rigor. In the field of transformer bushings, DIN is not only a technical specification, but also a synonym for quality and safety. This article will take you to explore the design logic, material innovation, and full lifecycle management wisdom of German standard casing.

01 Breakthrough in Double Layer Composite Insulation Materials

The Al ₂ O ∝ - SiO ₂ nanocomposite ceramic developed by the German KERAMCHEMIE laboratory has increased its bending strength to 135MPa (traditional ceramic bushings only have 85MPa). In its microstructure, a continuous network of 3-5 nm grain boundaries is formed, which reduces the thermal stress crack propagation rate of the casing by 62% under the impact of temperature difference from -40 ℃ to+150 ℃.

The organic-inorganic interface treatment technology is another major innovation. A 0.2 μ m thick fluorosilane coupling layer was generated on the surface of the ceramic parts using plasma grafting method, resulting in a bonding strength of 4.5 MPa for the silicone rubber umbrella skirt. The performance degradation rate after wet heat aging (1000h/95% RH) was less than 8%. This technology successfully solves the problem of discharge at the interface of composite casing, ensuring stable control of partial discharge within 5pC.

Technological iteration under the background of carbon neutrality in 02

The new version of DIN EN 50342-2023 introduces a carbon footprint assessment clause, requiring that the life cycle carbon emissions (LCA) of the casing do not exceed 35t CO2e/MVA. By using bio based silicone rubber (60% castor oil derivative) and electric arc furnace recycled aluminum, ABB's new EcoGIT sleeve series has reduced carbon strength by 42% and has been certified by T Ü V Rheinland Zero Carbon Factory.

Modular quick release structure has become a new trend. The snap on conductive rod component developed by Phoenix Contact can complete sleeve replacement within 2 hours (traditional methods require 8 hours), combined with robot live working technology, reducing power grid outage losses by 90%. This design has been applied to the first ± 525kV offshore wind power flexible straight project in Europe.